College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 22 - Reflection and Refraction of Light - Learning Path Questions and Exercises - Exercises - Page 774: 5


a). (3) $tan^{-1}\frac{w}{d}$ b). $27^{\circ}$

Work Step by Step

a). $tan r= \frac{w}{d}$ or, $r=tan^{-1}(\frac{w}{d})$ As per the law of reflection, i=r, so, $i=tan^{-1}\frac{w}{d}$, option (3) is the answer. b). $i=tan^{-1}\frac{25cm}{50cm}=tan^{-1}(\frac{1}{2})$ thus, $i=27^{\circ}$
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